先取明矾除去杂质,打碎,分置二个锅中以同样的火力加热熔化,在熔化的过程中,一个锅内的明矾进行不断搅拌,另一锅则不搅拌,煅至以后锅为标准,明矾合符要求为度。二个钢同时(火夸)离火炉,俟冷进行如下比较,见左表。讨论: 明矾主要是含硫酸铝钾结晶水[AlK First take the alum to remove impurities, break it up, and split the two pots to heat and melt with the same firepower. During the melting process, the alum in a pot is continuously stirred, the other pot is not stirred, and the pot is standard after being calcined. Alum meets the requirement for degree. At the same time, the two steels (fire exaggerations) were removed from the furnace and were compared as follows. See the table on the left. Discussion: Alum is mainly composed of aluminum potassium sulfate crystal water [AlK